Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
Sep 12 08:13:38 openmediavault collectd[2779]: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/df-media-f3863d78-6648-4e5e-98f2-5041b810ba35/df_complex-free.rrd, [1473682418:259656392704.000000], 1) failed with status -1.
Started seeing this message this morning. Any ideas what it is from? Haven't changed anything on my OMV since I installed it on this particular system. It just keeps repeating in syslog.